As local authorities sprayed vapour on the Mae Sai-Tha Chilek border area to alleviate the problem, coconut vendor Buahom Srinuan lamented she had to wear a facemask because the haze had worsened while people had stopped going out, affecting the sales of her products.
Phu Chi Fa National Park chief Sanit Homnan said officials and volunteers had managed to put off the forest fire spreading from the Laos border into the park on Monday.